JPH07246162A - Portable cooker - Google Patents

Abstract

PURPOSE:To provide a portable cooker utilizing a self combustion type heating unit containing oxygen donor. CONSTITUTION:A closed space 26 is formed in an outer vessel 1 of heat insulation structure with a openable lid 2 at the top. The closed space 26 stores, in a way possible to taking out, a heating unit 3 containing a self combustion type heating body 30 including an oxygen donor and a pot 4 for cooking laid on the heating unit 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable cooker, and more particularly to a portable cooker utilizing the heat of combustion of a self-combustion type heating element containing an oxygen donor.

[0002]

2. Description of the Related Art For example, when cooking outdoors such as when camping or hiking, a solid fuel containing paraffin as a main component has been conventionally used.
Because the firepower is weak and the burning time is short, the food items are limited,
In particular, there was a problem that rice cooking could not be performed, which is an important factor in terms of firepower and burning time. Further, since oxygen is required for combustion, there is a problem that it can only be used in a state where it is open to the outside air.

By the way, as disclosed in Japanese Patent Application Laid-Open No. 4-177056, a self-combustion type heating element containing an oxygen donor has been developed. This heating element contains ferrosilicon and a metal oxide (for example, ferric oxide, iron oxide lower than ferric oxide), and the metal oxide is oxygen with respect to silicon in ferrosilicon. By acting as a donor, it self-combusts without supplying oxygen from the outside. This heating element is attracting attention as a heat source for cooking because it generates extremely high heat of combustion and also obtains considerable residual heat after combustion.

[0004]

As an example of the use of the heating element as described above, it is already known that the heating element is attached to the bottom of the can and the can is heated by the heat of combustion of the heating element. Although it is on the market, it has not been used as a heat source for cooking (especially for rice cooking).

The present invention has been made in view of the above points, and an object of the present invention is to provide a portable cooker utilizing a self-combustion type heating element containing an oxygen donor.

[0006]

In the portable cooker of the present invention, a closed space is formed in an outer container having an insulating structure having an opening / closing lid at the upper end, and self-combustion containing an oxygen donor in the closed space. The basic structure is such that a heating table that accommodates a heating element of a mold in an open state and a cooking container that is placed on the heating table are stored in a removable manner.

In some cases, the heating table and the cooking container are integrally connected via a connecting means.

In some cases, the connecting means may be constituted by a pair of grips which are pivotally supported by the heating table so as to be swingable and press and fix the lid of the cooking container to the container body.

In some cases, the connecting means may be constituted by a protrusion formed on the heating table side or the cooking container side and an engaging groove for locking the protrusion.

In some cases, the outer container is used as a heat insulating container for keeping heat or for keeping cold.

The cooking container may be used for cooking rice.

[0012]

In the portable cooker according to the present invention, the cooking container is heated by the combustion heat of the self-combustion heating element and the residual heat after combustion, and the contents of the cooking container are cooked. Since the cooking is performed in the closed space inside the outer container having the heat insulating structure, the high temperature state can be maintained for a considerably long time even after the heating element is burned. Moreover, since the heat of combustion of the self-heating type heating element is extremely high and a considerable amount of residual heat can be obtained after burning, it is possible to freely perform strong heating and cooking that requires a long cooking time (for example, rice cooking). The heating element can be easily replaced by taking out the cooking container and the heating table from the outer container and then removing the cooking container from the heating table.

A connecting means for connecting the heating table and the cooking container (for example, a pair of grips for pressing and fixing the lid of the cooking container, or a locking force between the protrusion and the engaging groove formed on the heating table or the cooking container). ), The cooking container and the heating table can be put in and taken out from the outer container at once. When the connecting means is composed of a pair of handles for pressing and fixing the lid of the cooking container, one member can be used as both the lid retainer and the handle of the cooking container.

By removing the cooking container and the heating table, the outer container can be separately used as a heat insulating container for keeping heat or for keeping cold.

When the cooking container is used for cooking rice, it can be used as a rice cooker. In this case, it is necessary to adjust the capacity of the cooking container and the weight of the heating element so that sufficient heating power can be obtained when cooking rice.

[0016]

According to the portable cooker of the present invention, the cooking container is heated by the combustion heat of the self-combustion type heating element and the residual heat after the combustion, and the contents of the cooking container are cooked ( In other words, it is designed to be cooked in a closed space inside an outer container with a heat insulating structure, so the heating power during combustion is extremely high, and the high temperature state is maintained for a long time even after the heating element is burned. As a result, there is an excellent effect that it is possible to freely perform strong cooking and cooking (eg, rice cooking) that requires a long heating and cooking time. Further, since the heating and cooking can be obtained in a state of being shielded from the outside air, there is an effect that it is not affected by wind or the like and is optimal for cooking outdoors. Moreover, the heating element can be easily replaced by removing the cooking container and the heating table from the outer container and then removing the cooking container from the heating table, which is extremely convenient for use.

A means for connecting the heating table and the cooking container (for example, a pair of grips for pressing and fixing the lid of the cooking container, or a locking force between the projection and the engaging groove formed on the heating table or the cooking container). ), The cooking container and the heating table can be put in and taken out from the outer container at one time, which is extremely convenient. When the connecting means is composed of a pair of handles for pressing and fixing the lid of the cooking container, the lid holder of the cooking container and the handle can be combined into one member, which simplifies the component structure. There is also an advantage.

If the cooking container and the heating table are removed, the outer container can be separately used as a heat insulating container for heat retention or cold insulation, so that the application can be expanded.

When the cooking container is used for cooking rice, it can be used as a rice cooker, and the most difficult cooking can be easily performed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIGS. 1 to 3 show a portable cooker according to Embodiment 1 of the present invention.

As shown in FIGS. 1 and 2, the portable cooker according to the present embodiment has a bottomed cylindrical outer container 1 having an opening / closing lid 2 at the top, and is housed in the outer container 1 so that it can be taken out and put in freely. The heating table 3 and the cooking container 4 are provided.

The outer container 1 has a cylindrical outer case 5,
The outer case 5 is composed of a shoulder member 6 and a bottom member 7 which are joined to each other above and below, and a bottomed cylindrical inner case 8 which is joined to an inner peripheral edge of the shoulder member 6.

The outer case 5 is made of, for example, a sheet metal material, and the shoulder member 6 and the bottom member 7 are provided on the upper and lower opening edges thereof.
Curling portions 5a and 5b are formed which are to be joined with.

The shoulder member 6 is an annular member made of synthetic resin (for example, polypropylene), and has two annular walls 6 located on the outer peripheral side and the inner peripheral side at the lower end thereof.
The a and 6b are vertically installed. In the case of this embodiment, the outer peripheral side annular wall 6a is vertically extended longer than the inner peripheral side annular wall 6b.

On the outer periphery of the lower end portion of the outer peripheral side annular wall 6a,
An annular groove 9 into which the upper curling portion 5a of the outer case 5 is fitted is formed, and by fitting the upper curling portion 5a into the annular groove 9, the outer case 5 and the shoulder member 6 can be joined together. Has become.

On the other hand, at the lower end of the inner peripheral side annular wall 6b,
An annular groove 10 that opens downward is formed, and a curling portion 8 formed at the upper end of the inner case 8 into the annular groove 10 is formed.
The inner case 8 is positioned by the insertion of a.

A hinge support portion 15 for pivotally supporting the hinge pin 14 which is the swing center of the opening / closing lid 2 is integrally provided at an appropriate position on the upper surface of the shoulder member 6. Further, an engaging recess 16 for locking a lock lever 23, which will be described later, is formed at a position facing the hinge support portion 15 on the upper inner peripheral wall of the shoulder member 6.

Further, a handle 35 for carrying the outer container 1 is rotatably supported on the outer periphery of the shoulder member 6 (see FIG. 2).

The bottom member 7 is a dish-shaped member made of synthetic resin (for example, polypropylene), and has an annular shape in which the lower curling portion 5b of the outer case 5 is fitted around the upper end of the peripheral wall 7a. The groove 11 is formed. Then, by fitting the lower curling portion 5b into the annular groove 11, the outer case 5 and the bottom member 7 can be joined together. In the case of the present embodiment, a circular ridge 12 is formed in the center of the bottom wall 8b of the bottom case 8, and a plurality of bosses 13 and 13 are formed on the ridge 12 so as to project upward. In contrast, the bottom wall of the inner case 8 is coupled and supported via screws (not shown).

A heat insulating material (for example, urethane foam) 17 is provided in the space formed between the outer case 5 and the inner case 8 so that the outer container 1 has a heat insulating structure. It is said that.

The opening / closing lid 2 is provided with an upper plate 18 and a lower plate 19 made of synthetic resin (for example, polypropylene), and a heat insulating material is provided in a space formed between the upper plate 18 and the lower plate 19. (For example, styrofoam) 20 is provided as a heat insulating structure.

A hinge portion 21 on which the hinge pin 14 is pivotally supported is formed at an appropriate position on the peripheral edge of the upper plate 18, while an appropriate size is formed on the peripheral edge portion of the upper plate 18 opposite to the hinge portion 21. A recess 22 is formed, and a lock lever 23 for holding the closed state of the opening / closing lid 2 is pivotally supported in the recess 22 so as to be swingable. The lock lever 23 holds the opening / closing lid 2 in a locked state with the engaging claw 23a engaged with the engaging recess 16 on the shoulder member 5 side, and is always kept in the locking direction by the spring 24. Being energized. Also, this lock lever 2
On the upper part of 3, an operating portion 23b which is flush with the upper surface of the opening / closing lid 2 is integrally formed.

At the central portion of the lower plate 19, there is formed a raised portion 19a that is raised upward in a circular shape. Below the raised portion 19a, the upper end of the handle 36 (that is, the grip portion 36d, which will be described later) is formed. ) And the avoidance space 2 for avoiding the interference between the open / close lid 2 bottom surface
5 is to be formed.

The outer container 1 having the above-described structure is provided with an opening / closing lid 2.
In the closed state, the adiabatic closed space 26 is formed inside.

The heating table 3 comprises a bottomed cylindrical metal case 27 and a heat-resistant heat insulating material (for example, ceramic heat insulating material) 28 filled in the metal case 27. On the upper surface of the heat insulating material 28, a heating element 3 described later is provided.
A recess 29 for accommodating 0 is formed. A flange-shaped support portion 27a for supporting the cooking container 4 is integrally formed at the upper opening edge of the metal case 27.

The heating element 30 housed in the recess 29 is
It is considered to be a self-burning solid fuel containing an oxygen donor,
For example, it is formed by compression molding a mixture of ferrosilicon and metal oxide. In the heating element 30, the metal oxide acts as an oxygen donor for silicon in ferrosilicon, and self-combusts even without external oxygen supply. Here, as the metal oxide,
Ferric oxide and iron oxides lower than ferric oxide (for example, Fe ₃ O ₄ ) are used. In addition, this heating element 30
An igniting agent 31 is provided at the center of the upper surface of the. As the ignition agent 31, a mixed powder of iron, ferrosilicon, copper oxide, and barium peroxide is adopted. A donut-shaped thin iron plate 32 is placed on the upper surface of the heating element 30, and the iron plate 32 has a function of preventing local heating during combustion.

The cooking container 4 is composed of a bottomed cylindrical container body 33 and a lid 34 for closing the upper opening of the container body 33. Aluminum alloy, which is a good conductor of heat, is preferable as the material of the container body 33 and the lid 34,
It is also possible to use iron-based materials such as stainless steel. Code 3
Reference numeral 8 denotes a lid handle, which has a hat shape in this embodiment.

In the present embodiment, connecting means for integrally connecting the heating table 3 and the cooking container 4 is provided at positions on the opposite sides of the outer circumference of the metal case 27 in the heating table 3. At the same time, a pair of handles 36, 36, which are handles when the heating table 3 and the cooking container 4 are taken in and out of the outer container 1, are pivotally supported via brackets 37, 37.

As shown in FIG. 3, each handle 36 has one
This steel wire is bent in a substantially U shape, and both ends of the steel wire are bent in opposite directions to form pivotal support portions 36a, 3a.
6a, arm portions 36b, 36b extending from the pivot portions 36a, 36a in a substantially right-angled direction, and lid holding portions 36c, 36c formed by bending upward from the arm portions 36b, 36b at a right angle,
The lid pressing portions 36c and 36c are configured by a grip portion 36d that is bent and formed at a right angle.

The pivot portions 36a, 36a are provided with bearing portions 37a, 3 protruding from the bracket 37 so as to face each other.
7a is rotatably pivotally supported. With the cooking container 4 placed on the heating table 3, the handle 36 is swung upward, and the lid pressing portions 36c and 36c press the lid 34. By fixing, the heating table 3 and the cooking container 4 are integrally connected. That is, in the case of the present embodiment, the handle 36 constitutes a connecting means for integrally connecting the heating table 3 and the cooking container 4 together. In this state, the grip portion 36d of the handle 36 is
The opening / closing lid 2 is projected upward so that the user can easily hold it.
It is exposed in the avoidance space 25 on the lower surface.

The heating table 3 and the cooking container 3 are housed in the closed space 26 in the outer container 1 in the state of being integrally connected as described above.

Next, the case where rice is cooked using the portable cooker configured as described above will be described.

Outer container 1 to heating table 3 and cooking container 4
Then, the handles 36 and 36 are swung downward to separate the heating table 3 and the cooking container 4 from each other.
The weight corresponding to the amount of rice cooked in 2 (240 in the case of this embodiment)
Insert the heating element 30 of g).

Then, after putting the washed rice 3 R and the same amount of water W in the cooking container 4 and closing the lid 34, the ignition agent 31 is ignited and the handles 36, 36 are swung upward immediately. Then, the lid pressing portion 36c, 36c, 36c, 36c presses and fixes the lid 34 to integrally connect the heating table 3 and the cooking container 4. Heating table 3 and cooking container 4 in this state
Is held in the closed space 26 in the outer container 1 by gripping the grip portions 36d, 36d of the handles 36, 36, and the opening / closing lid 2 is closed.

Then, the heating element 30 has a metal oxide (that is, an oxidation second
As a result, the heating element 30 reaches a maximum temperature of 1300 ° C. within about 10 seconds after ignition, as shown by the dotted line in FIG. 4, by receiving oxygen donation from iron and iron oxides of lower order). After burning for about 2 minutes, it gradually cools while retaining residual heat, but maintains a temperature of 90 ° C. or higher even after 40 minutes, which is the time required for cooking rice.

Moreover, the air in the heat-insulated closed space 26 in which the cooking container 4 is housed is also heated by the heat of the heating element 30.
(That is, about 100 ° C.).

On the other hand, the cooking container 4 is heated by the heat of combustion from the heating element 30 and the heat of the air in the heat-insulated closed space 26, and as shown by the solid line in FIG. After reaching the boiling temperature of about 100 ° C., the boiling temperature is maintained for 30 minutes, and then the temperature is gradually lowered.
In other words, cooking temperature (ie, 10 minutes) (ie, 10 minutes)
Time required for cooking after the temperature is raised to 100 ° C)
The cooked temperature is maintained (that is, for 30 minutes), and steaming is performed in the subsequent temperature decreasing process, so that delicious rice is cooked.

As described above, in the case of this embodiment in which the heat of combustion of the heat generating element 30 and the residual heat after combustion are used to cook rice in the heat insulating closed space 26, the heating power of the heat generating element 30 and the heat insulating closed space 2 are used.
Delicious rice is cooked because it is possible to make the temperature change in the cooking container 4 most suitable for cooking rice in combination with the heat retaining power of 6.

In the case of this embodiment, the heating table 3 and the cooking container 4
And a pair of handles 3 for pressing and fixing the lid 34 of the cooking container 4.
Since they are integrally connected via 6, 36, the cooking container 4 and the heating table 3 can be put in and taken out from the outer container 1 at a time, and the lid holder of the cooking container 4 and the handle 36 are Since one member can be used in common, the component structure is simplified.

The portable cooker of this embodiment can be used not only for cooking rice but also for other various cooking.

The outer container 1 of this embodiment can also be used as a heat insulating container for keeping heat or for keeping cold when the heating table 3 and the cooking container 4 are taken out.

Embodiment 2 FIGS. 5 and 6 show a portable cooker according to Embodiment 2 of the present invention.

In the case of this embodiment, the heating table 3 and the cooking container 4
The structure of the connecting means for integrally connecting and and the connecting means of the lid 34 and the cooking container 4 are different from those of the first embodiment, and other structures and operational effects are the same as those of the first embodiment. .

In this embodiment, the supporting portion 27a of the metal case 27 of the heating table 3 has an L-shaped cross section, and the upper end of the supporting portion 27a has three helicoid shapes (that is, L-shaped).
Engaging grooves 39, 39, 39 having a letter shape are cut out at equal intervals in the circumferential direction. Each of the engagement grooves 39 is composed of a vertical groove portion 39a having an open upper end and a horizontal groove portion 39b horizontally extending from the lower end of the vertical groove portion 39a.

On the other hand, the lower end portion of the cooking container 4 is a small diameter portion 4a which can be inserted into the supporting portion 27a, and the outer periphery of the small diameter portion 4a is engaged with the engaging grooves 39, 39, 39, respectively. Three projections 40, 40, 40 to be stopped are provided at equal intervals in the circumferential direction.

In the above structure, the cooking container 4
Side projections 40, 40, 40 to the engaging grooves 39, 3 on the heating table 3 side.
When the cooking container 4 or the heating table 3 is rotated after being inserted into the vertical groove portions 39a, 39a, 39a in 9, 39, respectively, the protrusions 40, 40, 40 cause the projections 40, 40, 40 to be in the horizontal groove portions 39b in the engaging grooves 39, 39, 39. , 39b, 39b, respectively,
The heating table 3 and the cooking container 4 are integrally connected. That is, in the case of this embodiment, the engagement grooves 39, 39, 39
And the protrusions 40, 40, 40 constitute a connecting means.

Further, in this embodiment, three helicoid shapes (that is, L-shapes) are provided at the lower end of the peripheral wall 34a of the lid 34.
Engaging grooves 41, 41, 41 are formed at regular intervals in the circumferential direction. Each of the engaging grooves 41 is composed of a vertical groove portion 41a whose lower end is open and a horizontal groove portion 41b horizontally extending from the upper end of the vertical groove portion 41a.

On the other hand, the outer periphery of the upper end of the cooking container 4 is locked to the engaging grooves 41, 41, 41, respectively.
The individual projections 42, 42, 42 are provided at equal intervals in the circumferential direction.

In the above structure, the cooking container 4
Side projections 42, 42, 42 to the engaging grooves 41, 4 on the heating table 3 side.
When the lid 34 is rotated after being inserted into the vertical groove portions 41a, 41a, 41a of the blades 1, 41, respectively, the protrusions 42, 42, 4
2 is the horizontal groove portion 41b, 41 in the engaging groove 41, 41, 41
The lid 34 is coupled to the cooking container 4 by being respectively locked to the b and 41b.

Further, in the case of this embodiment, the lid handle 38 of the lid 34 is composed of an inverted U-shaped member attached to the upper surface of the lid 34.

In each of the above examples, a mixture of ferrosilicon and a metal oxide (ferric oxide and lower order iron oxide) is used as the heating element, but self-combustion containing an oxygen donor is used. Any other type of heating element may be used as long as it is a heating element of a mold.

The invention of the present application is not limited to the configurations of the above-described embodiments, and it goes without saying that the design can be changed without departing from the gist of the invention.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a portable cooker according to a first embodiment of the present invention.

FIG. 2 is a side view of the portable cooker according to the first embodiment of the present invention.

FIG. 3 is a perspective view in which a part of the heating table in the portable cooking device according to the first embodiment of the present invention is cut away.

FIG. 4 is a characteristic diagram showing changes in temperature inside the heating element and the cooking container when rice is cooked using the portable cooker according to the first embodiment of the present invention.

FIG. 5 is a vertical sectional view of a portable cooker according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a state where the heating table and the cooking container are separated in the portable cooker according to the second embodiment of the present invention.

[Explanation of symbols]

1 is an outer container, 2 is an opening / closing lid, 3 is a heating table, 4 is a cooking vessel, 17 and 20 are heat insulating materials, 26 is a closed space, 30 is a heating element, 34 is a lid, 36 is a handle, and 39 is an engagement member. Grooves and 40 are protrusions.

Claims (6)

[Claims] 1. A closed space is formed in an outer container having a heat insulating structure having an opening / closing lid at an upper end, and a self-combustion type heating element containing an oxygen donor is accommodated in the closed space in an upwardly opened state. A portable cooker characterized in that the heating table and the cooking container placed on the heating table are housed in a removable manner. 2. The portable cooker according to claim 1, wherein the heating table and the cooking container are integrally connected via a connecting means. 3. The connecting means is constituted by a pair of grips that are pivotally supported by the heating table so as to be swingable and press and fix the lid of the cooking container to the container body. The portable cooker according to claim 2. 4. The connecting means comprises a protrusion formed on the cooking container side, and an engagement groove formed on the heating table and engaged with the protrusion. The portable cooker according to claim 2. 5. The portable cooker according to any one of claims 1 to 4, wherein the outer container is used as a heat insulating container for keeping heat or for keeping cold. 6. The portable cooker according to claim 1, wherein the cooking container is used for cooking rice.